Ice-making and refrigerating machinery.



T. SHIPLBY.

ICE MAKING AND REFRIGERATING MACHINERY.

APPLICATION FILED FEB.28,1913. 1,087,052, Patented Feb. 10, 1914.

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ICE MAKING AND REFRIGERATING MACHINERY.

APPLICATION FILED FEBZB, 1913.

1,087,052, Patented Feb. 10, 1914.

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V Y aka Val/1e [1, Attorney T. SHIPLEY. ICE MAKING AND REFRIGERATING MACHINERY. APPLICATION FILED FEB-28,1913.

1,087,052. Patented Feb. 10, 1914.

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THOMAS SHIPLEY, 0F YORK, PENNSYLVANIA.

ICE-MAKING AND BEFRIGERATING MACHINERY.

Specification of Letters Patent.

Application filed February 28, 1913. Serial No. 751,252.

To all whom it may concern Be it known that I, THOMAS SHIPLEY, of the city of York, in the county of York and State of Pennsylvania, have invented certain new and useful Improvements in Ice- Making and Refrigerating Machinery, of which the following is a specification.

This invention relates to that type of ammonia condenser, for use in refrigerating and ice making plants, wherein there is maintained at the gas injecting point a constantly renewed body of its own liquid into which the gas is injected and thereby condensed, as described and claimed in my Letters Patent No. 1,079,610 granted November 25, 1913. v

The object of the improvement is to enhance the efficiency of a condenser of this type, and at the same time to obtain this effective condensing action with much less cooling surface than has hitherto been employed. For this purpose theopposite ends of the body of the condenser are directly connected by a return pipe, through which, and the condenser body, the liquid may circulate in a closed cycle. The ammonia gas is injected under pressure at one of the ends of the pipe into the body of liquid ammonia maintained therein at the in ecting point, the gas being thereby condensed, and the condensate being discharged from the opposite end of the pipe into the condenser which is used to cool an already condensed gas instead of being used, as heretofore, first to condense the gas and afterward to cool the condensate, thus enabling the area of cooling surface required to be very materially reduced.

In the accompanying drawings-Figure 1 is a longitudinal vertical section of so much of a coil condenser as is needed to illustrate the improvement as applied to this form of condenser; Fig. 2 is an elevation partly in section of a modification thereof; Fig. 3 is a vertical section of a shell condenser embodying the improvement; Fig. 4 is a longitudinal vertical section of still another modified form of coil condenser.

Referring to Fig. 1, the body of the condenser coil, like that of the usual standard condenser, is formed .of a pipe which extends continuously without ,a'break in horizontal stretches or lengths A A, the bends a of this pipe being suitably connectedto t e straight stretches or lengths (in this in- .Stance ten in number) of the said pipe. The

cooling water used enters the overhead dis- .tributing trough X, and through suitable perforations in the bottom of the said trough is showered down upon the coil be low in the usual manner.

The bottom coil or stretch A is connected directly with the top stretch A by a return pipe C which forms part of the coil. The 0011 thus comprises an endless pipe through which its contents .can travel in a closed cycle.

The ammonia gas from the compressor is led to the condenser through the pipe I), and enters the condensing coil at the bottompart thereof. Before entering the coil at this point, I prefer to subject it to a preliminary cooling, and for this purpose the pipe 6 opens into a preliminary section composed of a pipe coil B of two lengths or stretches, connected at one end by a bend b, the upper length of the pipe coil B being connected with a short length of pipe 0 (shown in the form of a nozzle) which enters the return pipe C at or near the bottom thereof, and extends up therein so that its discharge end will be some little distance above the oint where the return pipe joins the bottom ength A of the condensing coil, the nozzle being of sufiiciently less diameter than the pipe to leave 'between the two an annular space somewhat similar to the annular space around the lifting steam nozzle of an injector. Through this annular space the ammonia liquid can pass from the bottom length of the condenser coil into the return pipe. The ammonia gas entering the return pipe C through the injector nozzle 0 is forced into the body of liquid ammonia contained in said pi e. The valve controlled outlet for the condensed and cooled liquid is arranged at a higher level on the condenser than the nozzle c and is shown at D on the second length A above the bottom length A of the coil. It may be arranged at any desired point on the said coil, but in order to take oil the liquid where it is coldest, it is preferred to place the said outlet in this instance as near the bottom as is practicable.

The preliminary cooling coil B, which is not claimed per se, serves, as in other condensers heretofore in use, to take out the sensible heat of the ammonia gas before it enters the condenser-proper where the principal work of condensation takes place. It is not, however, essential, and may be dis Patented Feb. 10, 1914.

at l. The mode of operation of this apparatus is substantially the same as that of the apparatus shown in Fig. 1. The ammonia gas is injected in the return pipe, and the resultant circulates up through the return pipe into the top of the shell, where it meets the cold water tubes g, and passes down to join the body of the liquid below, whence it passes back throu h the supply pipe f into the pipe C again, t e surplus liquid of condensation passing off through the outlet D. In this form of condenser, the gas jet may be at the top of the return pipe, as indicated by dotted lines in Fig. 3, which represents the nozzle 0 as applied to the top instead of the bottom of the return pipe, in position to inject the gas into the pipe in a downward direction. In this case, the circulation of the ammonia liquid in the condenser will be in a direction opposite to that indicated by the arrows in Fig. 3, and the supply of fresh cold liquid for the return pipe to meet the entering as will be drawn from the top instead of rom the bottom of the condenserotherwise the operation will be the same as that last described.

A like modification can be made in the coil condenser, as indicated in Fig. 4. In

this modification the gas nozzle 0 enters a chamber 0 which communicates with the top stretch A of the condenser coil, and has in advance of the nozzle a conical tube 0 through which the contents of chamber 0 pass into the return pipe C beyond. The arrangement is similar to the steam nozzle and combining tube of an ejector for handling water. The ammonia gas is injected through nozzle 0 in jet form into the body of liquid in chamber 0 and is thereby condensed, the resultant, by the force of the jet, bein 1g driven through the combining tube 0 into t e return pipe C below, the liquid in chamber 0 being constantly renewed by the supply drawn from the top stretch A of the condenser. The circulation, which is in practically a closed cycle, is from chamber 0 down through the return pipe C and thence up through the condenser coil to the point of beginning, with rovision, of course, as indicated at D, for taking off the liquid of condensation as it accumulates beyond the volume needed. The outlet D is located on the top stretch A; and the liquid is sup plied to the chamber 0 from the same stretch A, where, under these conditions, the liquid will be coldest. I would say, however, that this supply need not be taken in any case from absolutely the coolest portion of the liquid contents of the reservoir. For example, in the case of the condenser under consideration, it may be taken from a point on the coil belowthe topmost stretch, but Where the liquid is still cool,- the return pipe being connected to the coil at that point instead of to the topmost stretch the condenser remaining otherwise unchanged. And I desire to be understood as including any such obvious modification in my claim. It is best, however, in any case to take the supply of liquid from as near the coldest polnt in the condenser as practicable, inasmuch as the cooler the body of liquid into which the gas is injected, the more rapid and thorough will be the work of condensation.

I do not here claim specifically the form of condenser shown in Figs. 1 and 2 and, in full lines, in Fig. 3, inasmuch as the same is the subject of my Letters Patent No.

1,079,609, granted November 25, 1913, on my application Serial No. 728,577 filed October 30, 1912.

What I do here claim and desire to secure by Letters Patent, is:

In a condenser of the type described, the combination with the body of the condenser having an outlet for the condensed and cooled liquid, of a return pipe directly connecting the ends of the said condenser body, and a gas injecting nozzle arranged at the upper end of the return pipe to inject at that point the ammonia gas under pressure into the body of ammonia liquid in said pipe, the gas being thereby condensed and the condensate being discharged from the lower end of said return pipe into the body of the condenser, substantially as and for the purposes hereinbefore set forth.

In testimony whereof I afiix my signature in presence of two witnesses.

THOMAS SHIPLEY.

Witnesses A. B. STRICKLER, J. B. RABY.

B. F. UPHAM. TBIPPING MECHANISM FOR PRINTING PRESSES.

APPLICATION FILED MAR... 17, 1910. RENEWED JUNE 12, 1913.

1,087,055 Patented Feb. 10, 1914.

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